Latch.



W. PATTERSON.

LATCH.

APPLICATION FILED MAR. 22. l9l6.

Patented July 25, 1916.

awuzmtoz PATEN oirnion.

WILLIAM PATTERSON, 0F CORRECTIONVILLE, IOWA, ASSIGNOR OF ONE-THIRD TO FRITZ BOHLE, OF CORRECTIONVILLE, IOWA.

LATCH.

Application filed March 22, 1916.

Too whom it may concern Be it known that I, WILLIAM PATTERSON, a citizen of theUnited States, residing at Correctionville, in the county of Woodbury and State of Iowa, have invented certain new and useful Improvements in Latches, of which the following is 'a specification. i

This invention relates to' latches and has for its object the provision of a simple device which maybe operated from either side of a door to lock theflatch against'accidental release. f y

p further object of the invention isto provide'ineans whereby a pivoted latch may be locked in engagement with a hasp orykeeper by movement of the knob spindleand the knob spindle locked against movement except upon positive manual manipulation.

The invention seeks to provide a device for the statedpurpose which will be free of complicated arrangements or structures and which may be produced at a low cost and easily repaired or parts re laced.

One form of the inventlon is illustrated in the accompanying drawings and the invention resides in certain novel features which will be hereinafter fully described and then particularly pointed out in the claims following the description.

In the drawings: Figure 1 is a view partly in elevation and partly in section of a latch embodying my invention with one side plate of the casing removed and showing the latch inengagement with the hasp; Fig. 2 is a similar view showing the position of the parts when the latch is locked out of engagement with the hasp; Fig. 3 is a vertical section taken through. theknob spindle and showing the parts in an intermediate position; Fig. dis a detail view of a part of one. face plate of the casing.

In carrying out myinvention, I employ a casing in which one faceplate 1 is preferably constructed with a flange 2 extend ing around all the edges of the said plate, and a second face plate 3 isxadapted to rest against the edge of said flangef The flange 2 forms the top, bottom and ends of the lock casing and intheouter end of the same is provided a vertical slot 4 through which the end of the latch; 5 projects and plays. The side or face plates ,1 and 3 are permanently securedtogether by means of screws or bolts inserted through thesame and supported by bosses 6 at the. corners of the Specification of Letters Patent.

the casing.

Patented July 25, 1916. Serial No. 85,962.

casing. Theface plates are provided with registering openings 7 and in the said openlngs are fitted bushingsS which receive and support the knob spindle 9 and on the inner ends of said bushings are annular flanges 10 which fitfagainst the inner surface of the face plates and thereby prevent withdrawal of the bushings and also guard against entrance of dust or other foreign matter into Suitable knobs or handles of any desired form are to be secured upon the ends of the knob spindle which is angular in cross section, as shown clearly in Figs. 1

and 2,. and is also slidable longitudinally in the bushings 8 which constitute the journals for the spindle in its rotary movement with: in the casing The latch 5 is provided at its outer end with a hook 12 adapted to engage a hasp or other form of keeper, indicated at 13 in dotted lines, and secured to the side of the barn or other building immediately adjacent the door opening, it being understood that the lock casing may be secured to the door in any well known manner. The inner end of the latch 5 is pivotally mounted upon a stud 1a which is secured to or formed integral with the inner side of the face plate 1 and said stud is provided with an annular enlarged' )oi;'tion 15 which serves to hold the latch spaced from the said face plate and in proper position to have its outer end play in the slot 4 without excessive wear upon the contacting surfaces.

Above and below the latch are freely mounted slidable locking bars 16 which have their outer ends arranged to bear respectively upon the upper and lower edges of the latch and constructed with reduced terminals 17 adapted to enter the slot 4: and fit snugly between an end of the same and the adjacent'edge of. the latch so as to wedge the latch in the openingand thereby hold it in either its raised or lowered position, as will'be readily understood. These locking bars are guided in their longitudinal movement by rollers 18 which are mounted on suitable pins 19 carried'by the faceplate 1 and arranged above the upper bar and below the lower bar, as clearly shown. The inner extremities of the looking bars are reduced, as shown at 20, so as to 'permit the ends of cranks 21 to fit between the bars and the; face plate "3," and these cranks 21 are pivotally attached to serveas guides or retainers to hold the bars in proper posit on to enter the slot 4: w1thout having an extendedbearing upon the said .face plate and,,consequently, creating excessive friction. The cranks 21 are preterably toi'n ed integral with a central enlarge nent Or disk 25 which is iitted upon the knob spindle and shrunk or otherwise secured the1;; eto so that the cranks will follow allthe movements of the spindle. The

cranks 21 are also provided in their outer sides with sockets 26 which are adapted .to engage pins or studs on the face plate 3 and, thereby hold the cranks against movement in a .transyerse plane of the knob spindle, andsuch engagement is normally and y bl maint ed y pri 2 wh h is coiled around the spindle between the inner, side of the disk .or enlargement 25 and the adjacent bushing 8.

The construction and arrangement of the se veralparts of nydevice being thus made known, it is thought that the operation will be readily understood. If it be desired to turn the knob spindle, the tension of the spring 28 must obviously be first overcome, and this operation is effected. by exerting a push or a pull upon one of. the knobs or handles accordingly as towhether the latch is to be operated from the inside or outside of the door. The force thus exerted upon the knob' o-r handle will effect longitudinal movement of the knob spindle and thereby compress the spring 28' and, inasmuch as the cranks 21 will follow the movement of the knob spindle, the sockets 2 6 will be withdrawn from their engagement ever the pins or studs 27 so that the knob spindle can then be rotated and the cranks moved past the said pins.

Assuming that the latch is .the position shown in, 1, and that it is desired to withdraw the same from its engagement with the hasp, the spindle is rotated in such direction that the upper lockingbar lfi will be moved inwardly while the lower bar will be moved outwardly} The lower crank 21,

connected with the lower locking bar, will positively swing downw ardlyas well as outwardly and this 1110378111611t will cause. the

barto ride upon the roller 18 outwardly and u a dly t ard e a ish" aa l ft th s me; as ho i '2 the pp b esimultaneously withdrawn from the slot 4 andiaway from the outer end of the latch so that the latch may move upwardly in the said slot.

In the position shown in Fig. l the end of the upper locking .bar fills the .slot 41 between the upper end of the same and the upper edge of the latch 5 which rests upon the lower end of the slot and accidental upward releasing movement of the latch is thereby prevented. As the upper locking bar re cedes, the latch, ,of course, is free to rise and will rise under the lifting force exerted against the same through the lower locking .bar whic w l 4. 19 n su h a p i i n that its .entren ity enters the slot 4: and fills the same between its lowerend and the under edge lotthe latch, as shown'in Fig. 2. In

this position of the parts, the latch will be tral pins, the parts will be in an intermediate position between the position illustrated in F 1 and that illustrated in Fig. 2. SO a he la il be eady o engage the hasp but will not be engaged with it and thelocking bars willbe in such posi tion that a slight movement in the desired direction will lock the latch in either itsraised or lowered position. lZV-hen the cranks are in either of the positions illustrated in Figs. 1 and 2, the pins 27 at the ends the series or sets of pins, will engage the sockets in the cranks and will thereby hold the knob spindle against rotation so that accidental release of the latch will be prevented.

' From the foregoing description it will be readily noted that I have provided an exceedingly simple device which may be pro dneed at a low cost and which is not apt to get out of order. The upper locking bar is held in engagement with the latch by the force-0t gravity and the roller 18 hearing thereon will prevent the locking bar swingof the crank 21 pivoted thereto, while the lower locking bar is so positioned relative to the roller 18 that it is prevented from droppingto an inoperative positionlby said It will be notedupon reference to ingaway from thelatch during movement roller and, as it is actuated through the v movement of thecrank pivoted thereto, will be directedagainst the latch. The studs 22' will, of course, be long enough to remain in engagement ith th n ngn h k ng ba i ll p iti n of h kn b s ndle. a th ra k s that th p ng of the inner endsof the locking bars away trom the cranks will notoccur and the device will consequently always be in Opera tive condition. The spring 28 will automatically cause the cranks to engage the pins 27 when the knobs are released so that the liability of leaving the door unlatched is minimized.

Having thus described the invention, what is claimed as new is:

1. The combination of a lock casing, a latch pivoted in and projecting through the same, locking bars mounted freely in the casing above and below the latch and adapted to engage the casing, respectively above and below the latch whereby to lock the latch in a set position, and means for operating said locking bars. a

2. The combination of a casing, a latch pivotally mounted in the casing and, projecting through the' same, locking bars mountedffreely in the casing above and below the latch andadapted to engage opposite sides of the same, means within the casing to guide the said locking bars into engagement with the casing at the side of the latch whereby to hold'the latch in a set position, and means for imparting movement to the locking bars simultaneously in opposite directions. a

3. The combination of a casing,a latch pivoted to and projecting through the easing, a knob spindle mounted in and extending through the casing, locking bars disposed above and below the latch and connections between the knob spindle and the locking bars whereby to cause either of said locking bars to engage between the latch and the casing to hold the latch in a set position.

4. The combination of a casing, a latch pivoted therein and projecting therethrough, locking bars mounted within the casing above and below the latch, aknob spindle mounted in and extending through the easing, said knob spindle having a longitudinal sliding movement and also a rotary movement, connections between said knob spindle and the locking bars whereby either locking bar may be caused to engage between the latch and the casing to hold the latch in a set position, means for yieldably holding the spindle against sliding movement, and means for positively holding the spindle against rotary movement.

5. The combinationof a casing having a slot in one end, a latch pivoted within the casing and projecting through said slot,

locking bars mounted freely within the casing above and below the latch, and means for causing the outer end of either tumbler to fill the slot in the casing between the end,

the casing, cranks fixed upon the said spindle and, having a sliding pivotal engagement with the inner ends of the locking bars, means for yieldably holding the spindle againstv sliding movement, and interengaging means on the casing and cranks to hold the spindle against rotary movement.

7. The combination ofa casing, a latch pivoted in and projecting from the casing,

locking bars disposed within the casing above and below the latch and adapted to engagebetween the latch and the casing to hold the latch in a set position, a plurality of internal projections on one side of the casing, a knob spindle slidably and rotatably mounted in the casing, cranks fixed to said spindle and provided on their inner faces with studs having slidable pivotal engage ment with the inner ends of the locking bars, the cranks being further provided in their outer faces with sockets adapted to engage the projections on the side of the casing, and means for yieldably holding the spindle against sliding movement.

8. The combination of a casing, bushings rotatably fitted in the opposite sides of the casing, a knob spindle slidably fitted in said bushings, cranks fixed upon the spindle ad-- jacent one of the bushings, a spring coiled around the spindle between said cranks and the other bushing, a latch pivoted in and projecting through the casing, locking bars mounted within the casing above and below the latch, slidable pivotal connections between the locking bars and the cranks, and interengaging means on the cranks and the casing to prevent rotary movement of the cranks and the spindle.

In testimony whereof I affix my signature.

WILLIAM PATTERSON. 148.1

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. V 

